Make changes or edit a photo is not a simple task without the proper tools and a little know-how. There are software programs that can assist in this task such as iMovie Plugin Pack. This is a program specifically designed to apply effects to photos on a Mac. You can for example get the sepia effect, ripples of water and much more. It looks like a plug-in that integrates with iMovie 2. It is easy to handle and the setup is not a problem. Its graphical interface is user friendly and allows a workspace very well thought out. Its implementation is not a problem and it is part of freeware if you want to try it.